电离层反射电波的能力取决于不同高度上电子密度的正常差别。
The ability of the ionosphere to reflect these waves is dependent upon normal variations in the electron density at different levels.
在此基础上得到电离层反射信号的多普勒频移公式以及穿过电离层的信号的多普勒频移公式。
The formulas of Doppler shift due to the reflected signal and that travelling through the ionosphere are thus derived.
短波有利于长距离传输广播节目，短波信号被围绕地球的电离层反射，能在大地和电离层间来回反射。
Short wave is good for broadcasting very long distances. The short wave signals bounce off the ionosphere that surrounds the Earth, back to the ground and then back to the ionosphere.
高频电离层信道反射信号的幅度衰落服从瑞利分布。
Envelope fading of reflecting signals on HF ionospheric channels is Rayleigh fading.
天波的传播是利用电离层的反射来实现的，尤其是多次反射后可以实现全球通信。
The transmission of the sky wave is realized by the reflection from ionosphere, especially after reflecting many times, to achieve global communication.
由于电离层会把这些频率的无线电波反射回地球表面，所以数百上千公里以外的接收器可以检测到它们。
Because radio waves of these frequencies are reflected back to the Earth's surface by the ionosphere, they can be detected by receivers hundreds of miles away.
高频天波超视距雷达所独有距离多跳现象，使得位于雷达威力覆盖范围以远的杂波通过地面与电离层的多次反射进入到雷达的接收阵列。
The sky wave over the horizon radar (OTHR) is a new mechanism in which the ionosphere is used as a mirror to reflect the radar high frequency signal to detect the target.
电离层高频反射回波的多普勒频移观测是研究电离层扰动的一个重要方法。
Doppler frequency shift observation of ionospheric high frequency echo is an important method for studying ionospheric disturbances.
电离层高频反射回波的多普勒频移观测是研究电离层扰动的一个重要方法。
Doppler frequency shift observation of ionospheric high frequency echo is an important method for studying ionospheric disturbances.
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